The promise of high-end phone services by mobile firms through the much-hyped third generation (3G) telecom technology seems to have hit a roadblock as customers complain of frequent call drops and inconsistent internet speeds.Experts say it could take between six and nine months for the service to stabilise.Anuj Kumar, a Delhi-based banker, preferred switching back to the 2G network after he got exasperated by deficient service and inconsistent network coverage.“Problems of call drops increased once I switched to 3G network. The voice quality also became very poor. I was left with no option but to switch back to the basic network. In my line of job uninterrupted calls are a must,” Kumar told IANS.Pratibha Srivastava, a sales manager with a leading private bank, had similar grievance.“The connectivity on the 3G network is very, very poor, especially when a person is on the move. While the network disconnects frequently, the voice quality is also not good at all,” said Srivastava.Among the nine-million odd people who are estimated to have opted for 3G services in the country, there are many others like Kumar and Srivastava who are facing similar problems with their services across the country.The private telecom operators who shelled out billions for buying spectrum claim that every new technology needed some time for maturing and becoming consistent. According to them it was a matter of time for consumers to experience the promised quality of 3G.But Telecom Regulatory Authority of India (TRAI) Chairman J.S. Sarma does not agree with the claims of operators.Mahesh Uppal, a telecom analyst and director of consultancy ComFirst India, maintains the networks are having problems because they were moving customers from 2G to 3G.A few operators also blame scarcity of spectrum to be a hitch for the service providers not being able to perform efficiently.